Automatic burglar-alarm



F. A. TERRY.

AUTOMATIC BURGLAR ALARM.

APPLICATION FILED .IULY 9.1917.

Patented M13: 17, 1920* 3 SHEETS-SHEET l.

INVENTOR fMIVIfL/A' fl 72-85);

A TTORNEYS F. A. TERRY.

AUTOMATIC BURGLAR ALARM. I

APPLICATION FILED JULY 9.1917.

Patented Aug. 17, 1920.

3 $HEETSSHEET 2.

mmvron win/88 s ATTORNEYS F. A. TERRY; AUTOMATIC BURGLAR ALARM.

APPLICATION FILED JULY 9.1917.

Patented Aug. 17,1920.

3 SHEETS-SHEET 3.

A TTORWEYS FRANKLIN ADELBERT TERRY, OF SAN FRANCISCO, CALIFORNIA.

AUTOMATIC BURGLAR-AI-IARM.

Specification of Letters Patent.

Application filed July 9, 1917. Serial No. 179,378.

To all whom it may concern:

Be it known that I, FRANKLIN ADELBERT. TERRY a citizen of the UnitedStates, and a resident of San Francisco, in the county of SanFranciscoand State of California, have invented an Improvement in AutomaticBurglar-Alarms, of which the followin is a specification.

y invention relatesto improvements n automatic burglar alarms, and itconsists 1n the constructions, combinations and arrangements hereindescribed and claimed.

An object of my invention is to provide a burglar alarm which will sendin a call for help over a telephone whenever the device is put, intooperation. stance, I have shown manual means for starting the devicewhich thereupon operates automatically, but it is obvious that pushbuttons might be arranged to start the device upon the opening of awindow or a door,without departing from the splrit of the invention.

My invention is illustrated in the accompanying drawings, forming partof this application, in which Figure 1 is a side View of the deviceconnected up with a telephone.

Fig. 2 is a plan view, certain parts being removed for the sake ofclearness.

Fig. 3 is an enlarged section on the line 3-3 of Fig. 2.

Fig. 4 is a perspective view of a spring suspending means.

Fig. 5 is a perspective view showing the arrangement of levers forcontrolling the device.

Fig. 6 is a diagrammatic view of the electric circuit.

In carrying out .my invention, I may make use of a phonograph of anyapproved type, such as a cylinder phonograph. In the drawings the baseof the phonograph is shown at 1, cylinder at 2, the travellng arm at 3,and the sound reproducing mechanism carried thereby at 4:. The cylinderis preferably provided with recorded calls which are repeatedatintervals, these calls being such as Send the police to 126 McAllisterstreet, or similar calls.

Normally, that is to say when the instrument is set, the diaphragm ofthe reproducing mechanism rests with its edge on a spring support 5 likethat shown'in Fig. 4, this spring support being secured to the easing ofthe device. The purpose of this support is to raise the needle from thewax cyl- In the present ininder, since the latter, in warm weather, isapt to permit the needle to sink in to such a distance that it isdifiicult to start the machine.

In connection with the phonograph I make use of a motor M whose shaft isprov1ded with an L-shaped arni 6. This arm is arranged to engage a lever7 which is pivoted at 8 and whose end is bent as shown at 9 to engageabrake lever 10.

Aswill'be seen from the drawings, and especially Fig. 5, I provide alever 11 which is plvoted at 12 and whose opposite end is bent 1].1t0U-shaped form, as shown at 13. The portion 13 is provided with a slot 14through which the brake lever extends. The end of the portion 13 iscurved upwardly and rearwardly, as shown at 15, so as to permit the hook9 on the end ofthe lever 7 to ride over the upper end of the brake leverto en age the latter, in the manner hereinafter described.

Secured to the lever 1 is an L-shaped arm 16 having a slot 17 arrangedto straddle the screw shaft 18, see Fig. 2,- which forms the drivingmeans for the movable arm13.

Associated with the phonograph is a telephone set, this set beingpreferably a desk set. In order to conveniently mount the same I providea stand or taboret 20 to which the desk set is firmly clamped. At 21 isa bracket bearing a bell crank lever 22, one end of this bell cranklever being attached, by means of a link or other suitable connection23, to the switch hook 24 of the telephone set. The other arm of thelever is attached to the U-shaped portion 13 of the lever 11. i

From the foregoing description of the various parts of the device theoperation thereof may be readily understood. The motor M is connectedwith the battery B, and the push buttons P or P ma be used to close themotor circuit when t e switch S is in the position shown in Fig. 6. Thiscircuit may be closed in any suitable way, such as by operating itmanually, that is to say pressing the push button with the hand, orclosing it by the opening of a window or in any other suitable manner.

Patented Aug. 17,1920.

In setting the device the phonograph is wound up and the brake lever 10is moved in position to prevent the operation of the phonograph, thelever 7 being brought over the end of the brake lever 10 to hold thelatter, as shown in Fig. 1. The movement of the lever 10 will cause theswitch hook 24 to be pulled downwardly where it will be held against thetension of the switch hookspring, precisely as if the receiver werehanging on the hook. The diaphragm of the reproducer is resting on thespring support 5.

Now if the circuit is closed by pressin the push buttons the motor Mwill turn an the arm 6 will engage the lever 7, raising the end 9 oilfrom the brake lever 10 whereupon the latter will be released and themachine started. At the same time the switch hook 24 will move to itsupper position so as to complete the talking circuit of the telephone.The movement of machine moves the arm 3 away from the support 5 andbrings the needle of the reproducer into engagement with the cylinderbearing the recorded calls. These are now sent in through the medium ofthe tube 28, and the sound amplifier 29, the latter being supported bymeans of a bracket or post 30 in front of the transmitter T of thetelephone.

The device will continue to repeat the calls until the hub 3* of the arm3 engages the arm 16, whereupon the lever 11 will be moved to theposition shown in Fig. 1, the hook 9 will be brought into engagementwith the upper end of the lever 10, so as to retain it in position, andthe switch hook of the telephone will be again drawn downwardly.

I? claim:

1. /A burglar alarm comprising a telephone set, a phonograph disposednear the set, a brake for normally holding the phonograph mechanismstationary against spring tension, means connecting the switch hook ofthe telephone set with the brake mechanism for holding the switch hookin normal position, a motor, an electric circuit for opcrating the motorcontaining circuit closing devices, a locking lever for holding the saidbrake lever in position to prevent the operation of the phonograph,connections between said motor and said locking lever for releasing thelatter and thereby permitting the operation of the phonograph, and thereleasing of the switch hook to bring it into position to complete thetalking circuit, and means for automatically resetting the brake and theswitch hook, when the alarm has been sent in.

. 2. A burglar alarm comprising a telephone set, a phonograph disposednear the set, a brake for normally holding the phonograph mechanismstationary against spring tension, means connecting the switch hook ofthe telephone set with the brake mechanism for holding the switch hookin normal position, a motor, an electric circuit for operating the motorcontaining circuit closing devices, means for holding the phonographneedle normally out of engagement withthe record, means actuated by themotor for releasing the brake mechanism and the A burglar alarmcomprising a telephone .set, a honograph' disposed near the set, a

brake or normally holding the phonograph mechanism stationary againstspring tension, means connecting the switch hook of the telephone setwith the brake mechanism for holding the switch hook in normal position,a motor, an electric circuit for operating the motor containing circuitclosing devices, means for holding the phonograph needle normally out ofengagement with the record, means actuated by the motor for releasingthe brake mechanism and the switch h'ook, means for subsequentlyshifting the needle holding means to permit the needle to be broughtinto operative engagement with the record, and means for automaticallyapplying the brake when the alarm has been sent in.

4. A burglar alarm comprising a telephone set, a phonograph disposednear the set, a brake for normally holding the phonograph mechanismstationary against spring tension, means connecting the switch hook ofthe telephone set with the brake mechanism for holding the switch hookin normal position, a motor, an electric circuit for operating the motorcontaining circuit closing devices, means for holding the phonographneedle normally out of engagement with the record, means actuated by themotor for releasing the brake mechanism and the switch hook, means forsubsequently shifting the needle holding means to permit the needle tobe brought into operative engagement with the record, means forautomatically applying the brake when the alarm has been sent in, andfor restoring the switch hook to its normal position.

5. A burglar alarm comprising a telephone set, a phonograph disposednear the set, a brake for holding the phonograph mechanism stationary aainst spring tension, means connecting t e switch hook of the telephoneset with the brake mechanism for holding the switch hook in normalposition, a motor, an electric circuit for operating the motorcontaining circuit closing devices, a support secured to the casing ofthe phonograph for manually holding a needle out of engagement with therecord, the movement of the reproducer which bears the needle serving tobring the needle into operative engagement with the record, and meansactuated by the motor for simultaneously releasing the brake mechanismand the switch hook.

FRANKLIN ADELBERD TERRY. Witnesses:

. J. R. CORNELL, M. I. KEANE.

